I know people who have tried it out, basically tried to live in their pension for six months to give them an idea.
That will soon give you pause for thought, OP.
Have you considered that the state pension age will almost certainly increase again? My SPA just now is 67. I am 48. I have no doubt that it will be 70 by the time I retire.
In any event, state pension is miserly. I know that you have another ten years to save, so let’s say you end up with £500k. Annuities are terrible value, so assume you want to make the £500k last for the rest of your life (let’s say you live 30 years, post retirement, to 85; it will probably be longer).
Could you happily live on £16k a year (£500k /30) plus (if you have built up your full entitlement, and after age 68, or whatever your final SPA is) £8k of state pension? A chunk of that will be taxable. Will it fund the lifestyle you want? Even if you use up most of your £500k in the (say) 15 years before you get state pension?
I’ve gone through this thought process and I’ve decided to work until my late fifties: ten more years. I don’t want to drastically cut back on my lifestyle. My occupational pension, which will be worth having because it’s defined benefit, kicks in at state pension age. I don’t want to be wishing my sixties away to get my hands on the cash! Better to work longer and keep my brain sharp, in my view.